Don't you think this was really mean of this guy to do to his son?

I was at a local baseball game for 3rd, 4th, 5th grade boys. This dad seemed to be forcing his son to play. The little boy was just having fun, and his dad was yelling dumb stuff at his kid like it was the major leaugues or something. So now to the point-after the game the kid and two of his teammates were just playing around like kids do and his dad yelled from the car, "get over here now!!" the kid motioned "one second." So his dad came over to him grabbed him by the arm, and yelled "you're getting a spanking when you get home." He embarassed his son in front of his friends. What's your opinion on this. It's wrong to me. I was a little scared witnessing it, lol.